[....] Starting enhanced syslogd: rsyslogd[ 10.868170] audit: type=1400 audit(1514835780.548:5): avc: denied { syslog } for pid=2988 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.968134] audit: type=1400 audit(1514835785.647:6): avc: denied { map } for pid=3128 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.15.215' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 22.172955] audit: type=1400 audit(1514835791.852:7): avc: denied { map } for pid=3142 comm="syzkaller167735" path="/root/syzkaller167735362" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 22.175501] syzkaller167735 uses obsolete (PF_INET,SOCK_PACKET) executing program [ 22.205132] audit: type=1400 audit(1514835791.852:8): avc: denied { map } for pid=3142 comm="syzkaller167735" path="/dev/usbmon0" dev="devtmpfs" ino=100 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbmon_device_t:s0 tclass=chr_file permissive=1 [ 22.237724] page:ffffea000720f3c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.245979] flags: 0x2fffc0000000000() [ 22.249938] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.258111] raw: dead000000000100 dead000000000200 0000000000000000 0000000000000000 [ 22.266189] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.273327] ------------[ cut here ]------------ [ 22.278053] kernel BUG at ./include/linux/mm.h:844! [ 22.283262] invalid opcode: 0000 [#1] SMP KASAN [ 22.287912] Dumping ftrace buffer: [ 22.291425] (ftrace buffer empty) [ 22.295103] Modules linked in: [ 22.298270] CPU: 0 PID: 3143 Comm: syzkaller167735 Not tainted 4.15.0-rc4-mm1+ #49 [ 22.305942] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.315277] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.320256] RSP: 0018:ffff8801c83df510 EFLAGS: 00010203 [ 22.325585] RAX: 0000000000000000 RBX: 1ffff1003907bea4 RCX: 0000000000000000 [ 22.332828] RDX: 0000000000000000 RSI: 1ffff1003907bdee RDI: ffffed003907be90 [ 22.340069] RBP: ffff8801c83df5e8 R08: 1ffff1003907bdb0 R09: 0000000000000000 [ 22.347307] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003907bea8 [ 22.354547] R13: dffffc0000000000 R14: ffff8801c83df840 R15: ffffea000720f3c0 [ 22.361793] FS: 00007fa564dc4700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.369984] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.375831] CR2: 00000000208be000 CR3: 00000001cc8c9006 CR4: 00000000001606f0 [ 22.383069] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.390306] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.397541] Call Trace: [ 22.400098] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.404215] ? finish_fault+0x1b4/0x2a0 [ 22.408155] ? lock_downgrade+0x980/0x980 [ 22.412268] ? do_swap_page+0x2a10/0x2a10 [ 22.416386] __do_fault+0xeb/0x30f [ 22.419894] ? pte_offset_kernel+0xc7/0xc7 [ 22.424098] ? vma_compute_subtree_gap+0x200/0x200 [ 22.428995] ? check_noncircular+0x20/0x20 [ 22.433200] ? _raw_spin_unlock+0x22/0x30 [ 22.437316] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.441694] ? __pmd_alloc+0x4e0/0x4e0 [ 22.445553] ? find_held_lock+0x35/0x1d0 [ 22.449591] ? handle_mm_fault+0x2a0/0x930 [ 22.453796] ? lock_downgrade+0x980/0x980 [ 22.457921] handle_mm_fault+0x38f/0x930 [ 22.461949] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.466496] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.472349] ? find_vma+0x30/0x150 [ 22.475857] __get_user_pages+0x50c/0x15f0 [ 22.480063] ? follow_page_mask+0x17f0/0x17f0 [ 22.484523] ? vma_link+0xe9/0x170 [ 22.488035] ? lock_acquire+0x1d5/0x580 [ 22.491973] ? lock_acquire+0x1d5/0x580 [ 22.495915] ? __mm_populate+0x2c7/0x450 [ 22.499944] ? lock_release+0xa40/0xa40 [ 22.503890] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.509743] ? rcu_note_context_switch+0x710/0x710 [ 22.514644] populate_vma_page_range+0x20e/0x2f0 [ 22.519366] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.524258] ? vmacache_find+0x5f/0x280 [ 22.528196] ? vmacache_update+0xfe/0x130 [ 22.532310] ? find_vma+0x30/0x150 [ 22.535816] __mm_populate+0x23a/0x450 [ 22.539673] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.544577] ? down_read_killable+0x180/0x180 [ 22.549044] ? security_mmap_file+0x143/0x180 [ 22.553513] vm_mmap_pgoff+0x241/0x280 [ 22.557371] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.562187] ? do_page_fault+0xee/0x720 [ 22.566134] SyS_mmap_pgoff+0x462/0x5f0 [ 22.570076] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.574797] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.579780] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.584502] SyS_mmap+0x16/0x20 [ 22.587750] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.592471] RIP: 0033:0x44a039 [ 22.595627] RSP: 002b:00007fa564dc3cd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 22.603298] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 000000000044a039 [ 22.610533] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.617774] RBP: 00000000006dbc20 R08: 000000000000001d R09: 0000000000000000 [ 22.625012] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 22.632258] R13: 00007ffd36c34cff R14: 00007fa564dc49c0 R15: 0000000000000009 [ 22.639501] Code: 00 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 41 bc 02 00 00 00 eb bb e8 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 22.658569] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c83df510 [ 22.665070] ---[ end trace a1f16bebb1724949 ]--- [ 22.669816] Kernel panic - not syncing: Fatal exception [ 22.675571] Dumping ftrace buffer: [ 22.679090] (ftrace buffer empty) [ 22.682771] Kernel Offset: disabled [ 22.686363] Rebooting in 86400 seconds..